Atomic Structure + Periodic Table Vocab Flashcards
1
Q
Atom
A
The smallest unit of matter that has the same properties of an element
2
Q
Proton
A
Positively charged subatomic particle in the nucleus (+1)
3
Q
Neutron
A
Neutral subatomic particle in the nucleus
4
Q
Electrons
A
Negatively charged subatomic particle outside of the nucleus (-1)
5
Q
Nuecleus
A
The center of an atom, has protons and neutrons
6
Q
Atomic Number
A
Number of protons, identifies an atom
7
Q
Mass Number
A
Number of protons and number of neutrons
8
Q
Group
A
Column on the periodic table, has the same number of valence electrons
9
Q
Period
A
Rows on the periodic table
10
Q
Valence electron
A
Electrons in the outermost energy shell. They determine reactivity
